Ejecting apparatus



July 21, 1925. 1,546,641

' -H. FQTHERGLL ET AL EJECTING APPARATUS Filed Nov. 26, 1923 2 Sheets-Sheet 1 INVENTOKS! HARRY FOT'HEZGILL W L|.\A- LAINC),

July 21, 1925.

H. FOTHERGILL ET .AL

EQIECTING APPARATUS Fi-led Nov. 26, 1923 2 Sheets-Sheet? W ow o wo 0000 o a o wowonwo o oo o o mwm w n o 0 o o e o vmo o 0 0 0 0 0 o e w n a? o wwo 0 0 own? 10 e Fig.6.

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Patented July 1. .1, 1925.

I-IARBY FOTHER-GILL [1ND WILLIAM ROBERTSON LAING, OF LONDON, ENGLAND.

EJEGTIING Application filed November To all whom it may concern:

Be it known that we, HARRY Fo'rr-nrncnn. and lVILLIAar Ronnnrson Lame, of London, in the county of London, England, have in vented certain new and useful improvements in Ejecting Apparatus, of which the following is a specification.

This invention relates to ejecting appara; tus in which two or more steam operated cjeetors are arranged in series with neans for condensing the vapour (.lischarged from the ejectors, the fluid to be ejected being re moved in two or more pressure stages. in apparatus of this kind it is usual practice to construct; separately the ejectors and condenser-s therefor, and as ,such apparatus necessitates numerous pipes and connections the cost of manufacture and erection is considcrable.

The object of our invention is to provide an improved construction in the form of a self-contained unit which comprises in one casing the ejectors and condensing devices therefor, thereby greatly reducing the cost of manufacture and facilitating the application of the apparatus for the purposes for which it may be required.

For this purpose we provide a vessel which divided by a partition 01- partitions into two or more sections containing steam operated ejectors and condensing devices, the partition or partitions having an opening or openings through which fluid in one section is passed by an ejector into the next section. Means are provided for the supply of water to the condensing devices and for the drainage of liquid from the sections. F or example, one or both ends of the vessel can be provided with a chamber or chambers for the supply of water to the condensing devices, which may be of the surface or direct contact type; and one or both ends may contain chambers or passages for the drainage of liquid from the sections.

The accompanying drawingaFigs. 1, 2, 3, a, 5, 6 and 7, illustrate convenient forms of our invention, the same letters of reference being used to denote the similar parts.

Fig. 1 illustrates diagrammatically in longitudinal section a two-stage'ejecting ap paratus of which Fig. 2 is a plan view; Figs. 3 and 4.- illustrate a modification of the lower part of the apparatus shown in Fig. 1; Fig. 5 illustrates diagrammatically in part section a three-stage ejecting apparatus of AEPABATUS.

26, 1923. Serial No. 677,060.

which Fig. 6 is a cross section, and Fig. 7 illustrates the application to a surface condenser of an ejector apparatus similar to that described with reference to Figs. 1, 2, 3 and at.

l i ith reference to Figs. 1 and 2, the con taining vessel (4 is in the form of a circular shell. This shell is divided by a vertical partition Z2 into two longitudinal sections 0 and a and is closed at each end by a plate a which receives the ends of the tubes t and 15 forming two surface condensing devices, one in each section 0 and (Z respectively. The plates 0 have external covers 7' containing chambers g, h and Z for the supply of water to and from the tubes 6 and t. In the arrangement being described the water enters chamber 9 and flows through the tubes 6 into the chamber h and thence through the tubes 6' to the outlet chamber Z. The section 0 is provided withan ejector m and the section cl is provided with an ejector 0, each ejector having a steam supply passage a through the upper tube plate 6 and water chamber /i. The first ejector m is arranged to draw from an inlet p through the side of the containing vessel a which in let, in practice, is connected up to the main condenser or other vessel to be evacuated and this ejector m discharges on to the condensin g surface 25 contained in the first section 0, and the second ejector 0 draws from the first section 0 and discharges on to the condensing surface t contained in the second section d, the latter having an outlet .9 through the'side of the containing vessel (4 for the discharge of the non-condensible gases. From the arrangement described it will thus be seen that the interior of the apparatus contains two sections under different pressures and the sections 0 and d are therefore referred to as pressure sections. For example, when using the apparatus for removing aerated vapour from a steam condenser operating under a vacuum of 29 the section 0 will operate under an absolute pressure of about three pounds per square inch, while the section 03 will work under approximately atn'iospheric pressure.

W hen it is desired to condense the vapour from the ejectors m and o by direct contact with the water, the condensing surface in one or more of the pressure sections 0 and (Z may be omitted and a spray or jets of water introduced into the section or sections from the water supply chamber h as required. Thus it is possible to use the same designs and patterns for both methods of condensation, which is a matter of considerable commercial utility.

The condensed steam may be drained from one or more 01' the pressure sections 0 and (Z through an outlet or outlets in the side of the containing vessel by known means, or such water may pass from one or more sections into a chamber or chambers arranged within the lower end of the vessel, and each chamber may contain a float-controlled valve through which the drainage water is discharged, for example, into a vacuum system. Such an arrangement is; shown in: Figs. 3 and 4-; Fig. 3 being a sectional view of a modified form of the lower cover shown in Fig. 1, and Fig. 4.- is a plan of Fig. 3 with the tubes and tube plate removed. In this arrangement the lower cover 7' contains two drainage chambers a; and 1 into which the condensed steam from the sections 0 and (Z flows through the openings 2' and j, the water being discharged under control of the floats 7; which open the outlet valves i) when the water level rises. The valves 1 with the floats 7c are attached to the doors 2 so that they may be easily removed for inspection when required.

It is to be understood that three or more ejectors with condensing devices may be arranged in the same containing vessel by the use of two or more partitions, and such ejectors may be arranged to operate in series, or arranged in one or more groups which operate in series. F or example, the containing vessel may be divided into three sections arranged in series for three stages of compression, each section containing one or more ejectors depending upon the requirements of the apparatus. Such an arrangement is indicated in Figs. 5 and 6, in which the containing vessel a is dividet by the partitions Z) into three pressure actions 0, w and (Z, the sections being provided respectively with ejectors m, a and 0 arranged in series and operating in the manner described in Patent No. 1,246,771.

lVhen, in the arrangements described, the steam supply to an ejector is superheated, a nozzle or et may be arranged to spray water from a supply chamber into the steam discharged from the ejector tor the purpose of de-superheating the steam.

In Fig. 7 the condensate extraction pump 3 delivers to the feed pump 7 through the condensing tubes in the containing vessel a of the ejecting apparatus 2, and the aerated vapour is withdrawn from the condenser 1 through the pipe 4 by the ejectors in the containing vessel a which are supplied with steam from the pipe 6. The drainage water from the containing vessel a is delivered into the condenser through the pipe 7, the

air escaping to the atmosphere through the vent pipe 8. With this arrangement all the latent heat in the operating steam from the jets and in the vapour withdrawn from the condenser is usefully absorbed in raising the temperature of the teed water. The appara tus is, in fact, an air ejector and feed heater combined, and contains in one casing the whole of the apparatus necessary for the withdrawal or the air and the condensation of the steam and vapour. .By its use the usual numerous pipes and connections are avoided, less space is occupied and the cost of manufacture and erection is considerably reduced.

Although we have illustrated convenient constructions by way of example, it is to be understood that the ejectors and condensing devices may be arranged in various ways in the interior of the containing vessel without departing from the invention. For instance, one or more ejectors which communicate with the pressure sections may be arranged in a separate section or sections which is or are not pressure sections in the sense herein described.

lVhat we claim and desire to secure by Letters Patent is 1. Ejector apparatus comprising a casing divided into sections containing steam operated ejectors and condensing devices, a chamber at one end of said casing for the supply or water to said condensing devices and a partition having an opening through which fluid in one section is passed by an ejector into the next section.

2. Ejector apparatus comprising a casing divided into sections containing steam operated ejectors and condensing devices, a chamber at one end of said casing for the supply of water to said condensing devices, means tor the discharge of water from said sections and an opening in a dividing partition through which fluid in one section is passed by an ejector into the next section.

3. Ejector apparatus comprising a casing divided into sections containing steam operated ejectors and condensing devices, a chamber at each end of said casing :tor the supply of water to said condensing devices and a partition having an opening through which fluid in one section is passed by an ejector into the next section.

4:. Ejector apparatus comprising a casing divided into sections containing steam operated ejectors and condensing devices, chambers at the ends of said casing for the supply of water to said condensing devices, and other chambers for the collection and discharge of water from said sections.

5. Ejector apparatus comprising a casing divided into sections containing steam operated ejectors and condensing devices, a chamber at one end of said casing for the supply of Water to said condensing devices llf) and openings through said chamber for accommodating the steam jets which discharge into aligned combining tubes located within said casing.

6. Apparatus for ejecting liquids comprising a casing divided by partitions into pressure sections, each pressure section containing asteam operated ejector and a surface condensing device, and a chamber provided at each end of said casing for the supply and discharge of water to and from said condensing devices.

7. Apparatus for ejecting liquids comprising a casing divided by partitions into pres sure sections, each pressure section containing a steam operated ejector and a surface condensing device, a chamber provided at each end of said casing for the supply and discharge of water to and from said condensing devices, and means for discharging the water from said pressure sections.

8. Apparatus for ejecting liquids comprising a casing divided by partitions into pressure sections, each pressure section containing a steam operated ejector and a surface condensing device, a chamber provided at each. end of said casing for the supply and discharge of water to and from said condensing devices, and float operated valves for controlling the discharge of water from said pressure sections.

9. Apparatus for ejecting liquids comprising a casing divided by partitions into pressure sections, each pressure section containing a steam operated ejector and a surface condensing device, a chamber provided at each end of said casing for the supply and discharge of Water to and from said condensing devices, and openings through one of said chambers for accommodating the steam jets which. discharge into aligned combining tubes located within said casing and carried by the structure forming the pressure sections of the apparatus.

10. Ejector apparatus comprising an outer partitioned casing, pressure sections in said casing separated one from another by the partitioning member, separate steam operated ejectors operatively associated with each section, condensing means for said ejectors, both ejector and condenser being enclosed within a common casing, condensing water chambers at both ends of said outer casing, surface condensing tubes in circulation with said chambers, and an open ing in the partition separating adjacent sections through which opening the fluid in one section can pass to the adjacent section under the influence of the ejector action.

11. Ejector apparatus comprising an outer partitioned casing, pressure sections in said casing separated one from another by the partitioning member, separate steam operated ejectors operatively associated with each section, condensing means for said ejectors, both ejector and condenser being enclosed within a common casing, a condensing water chamber at the top of said casing, a condensing water chamber at the bottom of said casing, surface condensing tubes between and communicating with said chambers, a compartment in said bot tom chamber for the collection and discharge of condensed drainage water, and an opening in the partition separating adjacent sections through which opening the fluid in one section can pass to the adjacent section under the influence of the ejector action.

12. Ejector apparatus comprising an outer partitioned casing, pressure sections in said casing separated one from another by the partitioning member, separate steam operated ejectors operatively associated with each section, condensing means for said ejectors, both ejector and condenser being enclosed within a common casing, a condensing water chamber at the top of said casing, condensing water chamber at the bottom of said casing, surface condensing tubes between and communicating with said chambers, a compartment in said bottom chamber for the collection and discharge of condensed drainage water, a float control for regulating the discharge of said condensed drainage water, and an opening in the partition separating adjacent sections through which opening the fluid in the section can pass to the adjacent section under the influence of the ejector action.

13. Ejector apparatus comprising an outer partitioned casing, pressure sections in the said casing separated one from another by the partitioning member, separate steam operated ejectors operatively associated with each section, condensing means for said ejectors, both ejector and condenser being enclosed within a common casing, 21. condensing water supply at one end of said casing, openings in said chamber for the accommodation of the steam jets of the ejector, means for discharging the condensing water, and an opening in the partition separating adjacent sections through which opening the fluid in one section can pass to the adjacent section under the influence of the ejector action.

14. Ejector apparatus comprising an outer partitioned casing, pressure sections in said casing separated one from another by the partitioning member, separate steam operated ejectors operatively associated with each section, condensing means for said ejectors, both ejector and condenser being enclosed within a common casing, a condensing water chamber at the top of said casing, 'a condensing water chamber at the bottom of said casing, surface condensing tubes between and communicating with said chambers, a compartment in said bottom chamber for the collection and discharge of condensed drainage Water, openings in the top condensing Water chamber for the accommodation of the steam jets oi the ejectors, a" d an opening in the partition separating adjacent sections through which opening the fluid in one section can pass to the adjacent section under the influence of the ejector action.

15. Ejector apparatus comprising an outer casing, partitioning within said casing to divide it into separate pressure sections, an opening in the partitioning separating adjaccnt pressure sections, a condensing Water supply chamber at one end of said casing and serving to supply condensing means for the pressure sections, openings in said condensing Water supply chamber, steam jets located Within said openings and combining tubes aligned with said steam jets and located Within and carried by the structure forming the pressure sections, into Which combining tubes said steam jets discharge.

i=3. Ejector apparatus comprising an outer partitioning casing, pressure sections Within said casing separatedone from another by the partitioning member, separate steam operated ejectors operatively associated with each section arranged to operate in series, condensing means for said ejectors, said ejector and condenser being enclosed Within a common casing, and an opening in the parti tion separating adjacent sections through which opening the fluid in one section can be compressed and discharged at a higher pressure to the adjacent section under the influence of the ejector action.

In testimony whereof, We aflix our signatures.

HARRY FOTHERGILL. l VILLIAM ROBERTSON LAING. 

